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Java parser for boolean expressions

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package com.github.sidhant92.boolparser.operator;

import java.util.ArrayList;
import java.util.EnumMap;
import java.util.List;
import java.util.Map;
import com.github.sidhant92.boolparser.constant.Operator;

/**
 * @author sidhant.aggarwal
 * @since 05/03/2023
 */
public class OperatorFactory {
    private static final Map operatorMap = new EnumMap<>(Operator.class);

    private OperatorFactory() {
        super();
    }

    public static void initialize() {
        final EqualsOperator equalsOperator = new EqualsOperator();
        final InOperator inOperator = new InOperator(equalsOperator);
        operatorMap.put(Operator.EQUALS, equalsOperator);
        operatorMap.put(Operator.GREATER_THAN, new GreaterThanOperator());
        operatorMap.put(Operator.GREATER_THAN_EQUAL, new GreaterThanEqualOperator());
        operatorMap.put(Operator.LESS_THAN, new LessThanOperator());
        operatorMap.put(Operator.LESS_THAN_EQUAL, new LessThanEqualOperator());
        operatorMap.put(Operator.NOT_EQUAL, new NotEqualsOperator());
        operatorMap.put(Operator.IN, new InOperator(equalsOperator));
        operatorMap.put(Operator.CONTAINS_ALL, new ContainsAllOperator(inOperator));
        operatorMap.put(Operator.CONTAINS_ANY, new ContainsAnyOperator(inOperator));
    }

    public static AbstractOperator getOperator(final Operator operator) {
        return operatorMap.get(operator);
    }

    public static List getAllOperators() {
        return new ArrayList<>(operatorMap.values());
    }

    public static void register(final AbstractOperator abstractOperator) {
        operatorMap.put(abstractOperator.getOperator(), abstractOperator);
    }
}